Press-roll stand for paper-making machines



Patented June 20, 1893.

Witnesses:

UNITED STATES PATENT ()FFICE.

ALONZO ALDRICH, OF BELOIT, WVISCONSIN.

PRESS-ROLL STAND FOR PAPER-MAKING MACHINES SPECIFICATION forming part ofLetters Patent No. 499,696, dated June 20, 1893.

Application filed December 5, 1892. Serial No. 454,028. (No model.)

To all whom it may concern.-

Be it known that I, ALONZO ALDRICH, a citizen of the United States ofAmerica, residing at Beloit, in the county of Rock and State ofWisconsin, have invented certain new and useful Improvements inPress-Roll Stands for Paper-Making Machines, of which the following is aspecification, reference being had therein to the accompanying drawingsand the letters of reference thereon, forming a part of thisspecification, in which- Figure 1 is an end view of the roll standhaving portions broken away to show the parts within, and showing a rolljournal in the box of the stand. Fig. 2 is a side view of the roll standmounted on a section of the frame of a paper making machine, and an endview of a pair of press rolls, the upper roll having its journal in thebox of the stand, parts of the stand being broken away to show the partswithin. Fig. 3 is a plan of the front roll stand omitting the worm gearmechanism and showing the doctor extending out over the roll box, andFig. 4 is a plan view of Fig. 2.

This invention relates to certain improvements in paper making machines,and relates more particularly to the stand supporting and operating thetop press roll of the machine, which improvements are fully set forthand explained in the following specification and claims.

Referring to the drawings, K represents a standard forming the standproper shown as mounted on the side frame of a paper making machine.This stand is shown as being made preferably of cast iron, and casthollow so as to contain within it a lever and mechanism for operatingthe lever.

H is a lever arranged within stand K and pivotally connected to saidstand near its upper end at a, on which pivot said lever swings. Saidlever H is formed as shown particularly in Fig. 2, its upper endextending forward out over the journal of the upper press roll R,'

and is provided with a box E for resting on the upper side of said rolljournal and having a strap G for passing around under said journal andsecured thereto by having its two ends pass respectively up through eyeboxes in the sides of said box, and having nuts turned on said ends, forthe purpose of securing said strap to said box for supporting the toppress roll R when said box is elevated and for enabling said lever toraise said roll. The lower end of said lever extends down within thestand K to near its base and is forked as shown at O, C.

P is a screw threaded shaft located in the lower part of stand K andbetween the forks O, O,of lever H, and is journaled at each end in thesaid stand:

L is anut on said screw shaft located so as to bear against the outerside of said lever against said forks (J, O, the forks O, O preventingsaid nut from turning with said screw shaft.

O is a ratchet wheel secured on the outer end of said screw shaft at itsforward end, and N is a hand lever having its lower end at boxed looselyon said shaft between said ratchet wheel and the stand K. Said lever isprovided with a barrel carrying a revoluble spring pressed pawl Z forengaging said ratchet wheel, so that said screw may be intermittentlyrotated in either direction by means of oscillating said hand lever, andsaid screw shaft may be rotated by means of said lever simply by turningsaid pawl so that its beveled lower end will slide in either directionover the teeth of said ratchet wheel, which teeth are intended to besquare, or similar to cog teeth, so that said pawl may engage them oneither side. By means of turning said screw shaft P so as to move saidnut L forward the lower long end of lever H will be carried or movedforward, the result of which is, that the box E on its upper end will beelevated, and carry with it the upper press roll R, as said press rollis held to said box by means of the strap G.

H is a hook formed integral with box E and is for the purpose ofattaching a weight rod (not necessary to be shown) to weigh down roll Bwhen necessary. The upper end of lever 11 is provided with a box B, forreceiving one end of the doctor shaft S. The outer end of shaft S isprovided with a box D having a pair of forwardly extending arms m, m,between which is located a cam 7, secured on the rear end of shaft 9journaled in box B on the outer end of arm A adj ustably attached to thetop of lever H by means of bolts passing through slot n. Said shaft 9 isdriven by means of a worm gear P secured on its forward end and whichreceives its mo tion from the worm W, on the extending end of thejournal of the upper press roll R, by means of which worm gear and cammechan- 5 ism the doctor shaft S, and the doctor m, and the doctor bladeA are reciprocated to better clean the roll R. Such a stand may belocated one at each end of roll R, for raising each end of said roll. Instands formerly used for this purpose the screw and box and upper partof the stand all extended above the top of the upper press roll R, andabove the doctor and its blade, so that accumulations on the doctorcould not be moved off from the doctor at either end to fall in somereceptacle as the roll stand was in the way. Fig. 3 shows the doctorarranged to extend out over the front journal of the roll and the frontstand of the roll, the worm gear mechanism not being on said front standas it is unnecessary to have more than one Worm gear mechanism toreciprocate the doctor and that preferably on the rear stand as shown inFig. 4.

It will be observed that in this device the stand and its appendages donot extend above the upper roll or above the doctor, so that it is easyto remove the accumulations from the doctor by sliding it off over thetop of the rear stand, which is a very great saving of time, and a greatconvenience, and not fraught with danger as in the old construction.Also it is unnecessary as in the old construction of stand to climb upon the machine in order to turn the box screw to elevate or lower theupper press roll. All this is accomplished in this device by means ofoperating the hand lever N and as the screw moves the nut against thelonger arm of the lever H a very heavy press roll can be very easilyelevated and that without the operator having to encounter the dangerand inconvenience of climbing up on the top of the stand as in the olderconstruc- Any other means than that shown for operating the lever H maybe used that will accomplish the same purpose.

In case it is desired to elevate the lower press roll R for any purposethe two press rolls may be connected by means of a link slipped on overtheir journals as shown in broken lines in Fig. 2. i

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows, to wit:

1. In a paper making machine a stand arranged adj aoent to the pressrolls, a lever pivotally connected to the upper end of said stand andhaving a box on its upper end for receiving the journal of the upperpress roll, and the means substantially as described for operating saidlever to elevate said press roll, the said stand and lever being less inheight than said roll and its doctor, all arranged to operatesubstantially as and for the purpose set forth.

2. In a paper making machine the combination of the stand K, lever Hpivotally connected to said stand near its upper end, and having the boxE for receiving the journal of the upper press roll R, strap G, screwrod P arranged in the base of the stand K, nut L arranged on said screwrod forward of the lower end of said lever and in contact therewith,hand lever N journaled on said screw rod and having the spring pressedrevoluble pawl Z, and ratchet wheel 0 secured on saidscrew rod adjacentto said hand lever and pawl, all arranged to operate substantially asand for the purpose set forth. 8o

3. In a paper making machine the combination of roll R having worm W,arm A having box B, shaft g, worm gear F, cam r, box D having arms orjaws m 'm, shaft S, and doctor A m, all arranged to operatesubstantially as and for the purpose set forth.

ALONZO ALDRICH.

Witnesses:

J. A. J ANVRIN, J. A. BRENTON.

